* {
    margin: 0;
    padding: 0;
}

ul,
li {
    list-style: none;
}

.wrapper {
    display: flex;
    flex-direction: row;
    width: 800px;
    height: 400px;
    border: 1px solid gray;
    border-radius: 2px;
    margin: 20px auto;
}

ul.tabs {
    width: 150px;
    min-width: 150px;
    height: 100%;
    /* background-color: red; */
    margin: 2px;
}

ul.tabs>li {
    height: 50px;
    line-height: 50px;
    text-align: center;
    background-color: lightgray;
    color: black;
    border-bottom: 1px solid white;
}

ul.tabs>li:hover,
ul.tabs>li.active
{
    background-color: gray;
    color: white;
}

div.content {
    flex-grow: 1;
    /* background-color: blue; */
    border-left: 1px solid gray;
    padding: 10px;
}